Crossword Resolver > Crossword Tips > Tips: LEGALLY Justified Do you know of another solution for crossword puzzle tips that contain substantiated LEGAL clues? Now, add your answer to the crossword puzzle. Although, in some cases, almost identical to sound, convincing can emphasize either the weight of the arguments and solid evidence, or the clarity of the presentation. The meanings of persuasive and sound largely overlap; Persuasive, however, indicates an ability to overcome doubt, resistance or reluctance. The prosecutor`s convincing summary convinced the jury.